To measure the wear on your tyres and to know when they need replacing, you need to inspect the tread. The tread comes into direct contact with the terrain you are cycling on and therefore determines your tyre's performance.
A tyre needs to be changed when the centre knobs are worn down to the same height as the side knobs.

How to remove a tyre

To remove your tyre, first deflate the inner tube until no more air comes out.
Once deflated, use a tyre lever to remove the tyre from the rim.

How to fit a tyre

To put the tyre back on, place one side of the tyre into the bottom of the rim. Next, inflate your inner tube to approximately 30% before putting it into the tyre (inflating it beforehand reduces the risk of pinching the inner tube). Then, insert the other side of the tyre into the rim, starting on the side opposite the valve. Before inflating the inner tube all the way, check to make sure it isn't pinched between the tyre and the rim.

How to inflate your tyre correctly

Inflate your tyre carefully. The recommended pressure is indicated on the side of your tyre as well as on its product sheet (available online).
Before each outing, make sure that your tyres are at the correct pressure for your ride.

Tip from the pros

When inflating your tyre, be sure to inflate it to the correct pressure for the terrain you will be riding on and especially the weather conditions. When riding in rainy weather, lower the tyre pressure to increase the tyre's traction. When riding in dry weather, you can increase the pressure for better performance.

At B'Twin we create the tyres of tomorrow. designed by our engineers at our research & development lab at our international headquarters in Lille, France. The tyre is then tested in our laboratories as well as in real world use by our professional cycling

Tyres

very good tyres purchased recently,

good price/value appear to be running well so far,would recommend these tyres for reliability

BTwin All-terrain 5 MTB tyre

02/12/2015

David
(United Kingdom)

Used for 2 to 8 weeks

Superb value and its profile and pattern make it a pretty good all round tyre - impressed so far.

All-purpose tread effective in mud and wet grass.

Profile is a bit narrow for loose trails.

Top tyre for little money

01/11/2014

jenny
(United Kingdom)

Used for 3 to 6 months

at 11.99 these are top quality tyres run them on county lanes city street and cycle paths as well as off road.Had a lot of heavy rain of late and still give me loads of grip on mud soaked horse trail tracks.So good in fact they if they did one with a blue side wall would put them on my other mtb.

good all round grip

n/a

Sorry to say not the best All terrain tyre

03/08/2014

Steven
(United Kingdom)

Used for 1 week or less

Thought I would give these a try as they were recommended by the u 19 bt win team ! personally didn't get on with them so now looking to buy different tyres

Great for tarmac rolls well on paths/roads

shocking on gravel, mud etc

Response of the brand

Hi Steven,Thanks for your mail, sorry to hear that the tyres didn't perform as you expected. We will happily exchange them for another product of your choice at one of our stores, or via the online service.Regards,